Lawyers are going to clean up on this one.
Not necessarily. My first thought when I read this is that it was something he did. Some kind of additive that he put in the gas, or something like that. I'm trying to think of a way that I could rig a chainsaw to explode. Can't think of any short of some explosive of some kind. Like putting super high octane in the gas.
You can catch a chainsaw 'on fire' fairly easily. But to make it actually explode with normal gas would be hard to do, especially to the point that it would kill a person. You need pressure and a sealed chamber for that.
Nah...I don't believe it. This was not a 'normal' accident IMO. Either the guy himself did something really stupid, or....somebody took him out.